Drill-extractor.



C. L. WILSON.

DRILL EXTRACTOR.

APPLICATION FILED 0cT.23.1911.

1,272,749, Patented July 16, 1918.

CORTEZ L. WILSON, OF IBISBEE, ARIZONA.

DRILL-EXTRAGTOR.

, Application filed October 23. 1917.

To all whom it may concern:

Be it known that I, Con'rnz L. WILSON, citizen of the United States,residing at Bisbee, in the county of Cochise and State of Arizona, haveinvented certain new and useful Improvements in Drill-Extractors, ofwhich the following is a specification.

This invention relates to devices for ex tractingdrills from rock andhas for its object the provision of a device for the stated purposewhich will be composed of few parts and will be, therefore, free ofcomplicated constructions and arrangements. The invention also seeks toprovide a device for the stated purpose which may be easily manipulatedand which will be positive and rapid in its operation.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective view of an apparatus embodying myimprovements;

Fig. 2 is a view partly in side elevation and partly in section;

Fig. 3 is a section taken on the line 3-3 of Fig. 2.

In carrying out my invention, I employ a gripping member 1 which isadapted to engage around the drill 2, a fulcrum member 3 which ispivoted to the gripping member and is adapted to bear against the sideof the drill, and an operating lever 4 which is pivotally mounted uponthe bearing member 3 and is constructed with a cam or eccentric 5 whichis adapted, when the lever is swung about its pivot, to bear against theside of the rock and thereby force the gripping and fulcrum members awayfrom the rock, a pulling force being exerted thereby against the drillwhich will withdraw it from the hole. The gripping member 1 isessentially an elongated block having an opening 6 at one end throughwhich the drill 2 may pass and provided at its opposite end with a notchor recess 7 in which the stem 8 of the fulcrum or bearing block 3 ispivoted. The head 9 of the fulcrum block extends laterally from the stem8 and is provided with a groove 10 in its outer face which is adapted tofit against the drill 2, as clearly shown in Fig. 1. The operating lever4 is pivoted at one end upon the fulcrum block by a pin or bolt 11inserted through the stem 8 of the fulcrum block between the pivotthereof and the head 9, as shown most clearly in Fig. 3, and theeccentric or cam 5 is formed on the side of the I Specification ofLetters Patent.

Patented July 16, 1918. Serial No. 198,173.

lever with its flat facebearing against the ject outwardly from the rockand the groove 10 in the head of said member will engage the drill sothat the fulcrum block will be prevented from dropping. The operatinglever will stand upright and against the face of the rock as shown inFig. 1, and it will preferably be provided with a longitudinal bore orsocket 12 in which may be engaged the end of a long bar or rod so as toincrease the leverage and the force which may be applied. The lever isthen swung downwardly so that the peripheral face of the cam oreccentric 5 will ride against the rock thereby forcing the pivot bolt orpin 11 outwardly and consequently causing the fulcrum block and. thegripping member to bind firmly against the drill so that it will becaused to follow the outward move ment of the fulcrum member and thegripping member and will be thereby withdrawn from the hole in the rock.Should a single movement of the lever be insufficient to fully extractthe drill, the lever may be returned to its upright position and thedevice slid along the drill until it bears against the face of the rockafter which the lever may be again swung downwardly and this operationmay be repeated until the drill is fully withdrawn.

My device is obviously simple in the constrnction and arrangement of itsparts and may be produced at a very low cost. It will be found highlyefiicient inoperation for the purpose for which it is designed, and isnot apt to get out of order and become inoperative.

Having thus described the invention, what is claimed as new is:

1. A device for the purpose set forth comprising a gripping member, afulcrum member pivoted thereto, said gripping member and said fulcrummember being adapted to engage a drill, and means mounted upon thefulcrum member for imparting a longitudinal movement to the grippingmember and the fulcrum member.

v 2. A device for the purpose set forthcomprising a gripping memberadapted to en: gage around a drill, a fulcrum member extending from thegripping member and adapted to bear against the side of the drill, andan operating member carried by the fulcrum member. 7

3. A device for the purpose set forth comprising a gripping memberprovided at one end with/an opening to receive a drill and provided witha notch at its opposite end, a fulcrum member pivoted within the saidnotch and adapted to bear against the side of the drill, and anoperating member mounted upon the fulcrum member.

4;. A device for the purpose set forth comprising a gripping memberprovided at one end with an opening to receive a drill and having anotch at its opposite end, a fulcrum member having a stem pivoted withinsaid notch and a head extending laterally from the stem to bear againstthe side of the drill, and an operating member mounted upon said fulcrummember.

5. A device for the purpose set forth comprising gripping member, afulcrum member pivoted to the gripping member, and an eccentricpivotally mounted upon the fulcrum member and having its plane faceopposed to the side of the fulcrum member.

6; A drill extractor comprising a gripping member to extend at an angleto the drill and provided at one end with an opening whereby to receiveand fit around the drill, a fulcrum block pivoted at one end to the endof the gripping member more remote from the drill and provided at itsfree end with an offset to bear against the drill, said offset having agroove in its face to engage the drill, and a cam fulcrumed upon saidblock at the side opposite the offset and the gripping member, said camhaving its plane face arranged parallel with the fulcrum block and itsperipheral edge pre sented to the body in which the drill is set.

In testimony whereof I aflix my signature.

CORTEZ L. WILSON. 1,. 5.

( opies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

- Washington, I). 0.

